Fishing tool



Sept. 15', 1925.

W. E. DAVISON ET AL FISHING TOOL 2 Sheets-Sheet 1 Filed Feb. 2 1923 k;

0 2 z a 2 z HI I I I I I I I 9 Z w Z? n2. IIII ...II|.|I IIIIIIIIIIAI IIII I IIIIIIIII I I ATTORNEYS:

Sept. 15, 1925.

W. E. DAVISON ET AL FISHING TOOL Filed Feb. 20 1923 2 Shee'cs$heet 2 jfll Efl Tom: VVILLMM E. DAV/son,

WILL/4m 8. MARSH/ILL,

ATTORNEYS.

Patented Sept. 15, 1925.

WILLIAM E DAWSON err iwip f i MAR AL gem-Perle :FISHING .T Q

Application riled 1:?ebrnaryv 20, 1923. Serial No. 620 217.

To all whom it may co n ocrn:

Be ,it knownwthat weylVrpnrnrryE. DAVI- soN and l YILLIA M B. MARsHaLL, looth citiens of the United States, residing at Fellows, in the county of-Kern and State of California, haveiinvent'ed a new and useful Fishing 'Tool,,of which the following is a specification. V

This invention relates to fishing tools employed in well drilling for removing articles from the hole being drilled. "In the drilling of wells, it oftelroccnrs that/tools or po-r- 'tions thereof hecomelost in the hole and the presence thereof makes farther drilling impossible. Thelost article .innst loe removed or the hole drawn to'the side in order to pass to one sidejofthepimpediment. A portion of a drill' hitor a disclfroina rotary disc hihwill cause serious jtronhle the bottom lot a well; and therefore m tich time and labor "s expend-ed in endeavoring to remove such l i9fi'slrom the hole. i It'is an olojectof ourinvention to provide men wear et er-t d .otthi'e ha e he removed-from; the holein a minimum time and with a minimum ,expenditnre of labor. Fishing tools ,are at present pro- Qvided by which isii ch articles are renioved i'rom the hole when the article centralized up on the jhottom, lo u t 'iflthe article to e r moval i Decen l y en ra i is be n shoved, to thes ide in the att'einpts to grapple it with a fisl iingitooli whichfir akes its moval from the holei'still more difficult.

5 It is anobject of m l-invention to provide .a fishingtool which will engage a non-cenmin; articleand will draw. it over to the centerhol' the hole instead of shoving i'tto one side as is. often done; with the present type oflishing tool.

The especial advantages of T the invention and 'fllrther ob jects thereof .will he made evident,hereinafter.

Referring to the drawings which are for i tfil i PurPQse's only, a

Fig. 1 is a eectional view showing one manner in which the inventioirmay be 261K1- ployed; V

Fig. 2 ist an enlargedpartially sectioned View ,showingthe fishing tool jaws andthe members by which they are support-ed.

--F 3 is a section taken upon a plane represented by; the line s e;0rr g.;2;

.Fig. A is a section taken ipon a plane represented by 1 the M line of Fig. 5 is a diagrammatic section showing.

a device which mayl be employed to. lr-elease the slips o f the device shown. iii-Fig. l.

Fig; 6 is an elevationalview showing the manner in which thezinventionimaydiepem ployed in su'spensionwith zrjars .ivhich are supported'loy Jacable.

"As "shown in :Fig; 1 a broken portionaof .a fish tool hit or a rdiscu rofla rotary discrbit 11 maybe lost incthezloottpmflof'ahole 112 which is being drilled and in which casing 13 is heing set. Our inventioniprovidesrfa fishing tool 14 which is comprisedoit ;a sleeve memberilf andQj aw memhersiltl. f Elie sleeve15 may bejoifned by asni'tahleiconpling 18' to the lower etr string of drill pipe 19 or it may he supported. as showniin F igz, 6 from a cable. In Fig.2 the lower end ofthe sleeve 15drom vwhich itllwj aw..members 16 extend issliown. 'iThes'eIjfaiwQmemhere are pivoted at their ripper-ends enpon pins 20 within recesses 2lii ior1ned iin'gtlre lower end of ahead-23 which operates within the sleeve 15. -Springsi24c :areupnovided which force inwardlyiagainstthe .upper ends 25 of the jaw memhers'JG andlthus maintain the j aw members normally spread apart, as shown in fnll lin es iii-Figs. iliand 2. :111 slots28, formed in the upper end offlth eyhea'ld 28 slips 1,29 are sitnated, these-islip'sheing supported springs 30. The slips 22.9.: have the function of preventingan npwarduinovement of the sleeve 15 relative to the head 23. It willloe noticed, however, that these slips do not prevent a downward.movement of the sleevelh upon the-head 23. v-lnlthe lower extremity of thesleeve-member =15,Qa slotted plate 32 is rsecnred, preferably ;by (threaded engagement 83. i This, plate 2182 as shown ingFigl dis provided with radially extending -slots34 in the-form of a cross "through which the jaw members extend. t

When the fishing tool is being lowered intoa .well, thehead 23 is disposed at the {lower end of the sleeve 15 and the' jaws-1 6 are spread apart. Upon reaching theiloo t- 'tom' of the well, the downward movementrof K thej aws' is; interrupted, whereupon the sleeve slides downwardly upon the head 23 and. the member 32 slides downwardly" upon the slop- .outer faces 37 of the jaws 16,:=forcing them together as indicated by -the dotted lines 38 in Fig 2, and as shown ind ullilines iirFigrh. lt will noticedg thatnponthe move upward relatively downward movement of the sleeve or tubular member 15, the lower ends 39 of the jaws 16 move radially inwardly so that any object over which the jaws may pass will be gripped by the teeth 40 formed at their lower ends 39. It will also be recognized that in event the lost article being fished for is to one side in the bottom of the hole, that the movement of the jaw member in contact therewith will have the tendency to draw the object towards the center of the hole, so that after a number of trials, the object will be sufficiently centralized for the jaws to pass thereover.

When the sleeve has moved downwardly upon the head 23, it is impossible for it to thereto owing to the presence of the slips. Therefore, a lifting action exerted upon the string of drill pipe 19 is transferred directly to the head 23 through the slips so that the entire fishing tool will be raised without a relative down ward movement of the jaws which would allow them to expand. Therefore, an article gripped by the jaws will be firmly held therein until the slips 29 are released so that the head 23 is allowed to return to the position at the bottom of the sleeve 15, in which position it is shown in Fig. 2.

As shown in Fig. 5 of the drawing, our invention provides means for releasing the slips either when the fishing tool is in the hole, or when it has been removed therefrom, therefore making it unnecessary to remove the entire string of drill pipe from the hole in order to reset the slips preliminary to making another trial. This means for resetting the jaws is illustrated in Fig. 5 and comprises a sleeve 50 which is suspended in the upper end of the sleeve 15 upon a cable 51. By dropping the sleeve 50, the lower edge 52 thereof is brought in forcible contact with the upwardly projecting ends 53 of the slips 29 and they are thereupon forced downwardly out of clamping position be tween the head 23 and the inner wall of the sleeve 15, thus allowing the head 23 to move downwardly within the sleeve and allowing the jaw members 16 to again be spread apart by the springs 24. Therefore, it is possible to reset the jaws in expanded position any number of times within the hole by merely raising the string of drill pipe by which it is supported several feet, and then jogging the cable 51 shown in Fig. 5 so that the inner sleeve 50 will be brought against the slips 29. By this arrangement much time is saved by not having to remove the fishing tool from the hole at each failure to grip the object being fished for.

As shown in Fig. 6 of the drawing, the sleeve 15 may be secured to the lower end 60 of the lower jaw member 61 which cooperates with an upper jaw member 62 having a cable 63 attached thereto. The head 23 in this in- "the top of the stance is not provided with slips and the direct lift thereupon, when the fishing tool is being lifted, is accomplished through a cable 65 which extends from a fixture 66 in head 23 to the lower end 67 of the upper jaw member 62. A catch plate 69 having slots 70 therein is mounted upon pins 71 at the upper end of the channel 72 in which the lower jaw member 61 slides. This plate 69 is provided with a catch projection 75 at its lower end and a projection 7 6 at its upper end. When the plate 7 5 slides downwardly upon the pins 71, the catch 7 5 projects under the return bend 77 of the lower jaw member 61, thus providing a means whereby the sleeve 15 and the lower aw member 61 may be supported in raised position relative to the upper jaw member during the lowering of the fishing tool into the hole. Upon striking or coming in contact with the object being fished for, the upper jaw member 62 moves downwardly upon the lower jaw member 61 so that the return bend 7 7 strikes the upper projection 7 6 and causes the plate 69 to move upwardly upon the pins 71. As this plate 69 moves upwardly, it also must travel outwardly upon the pins 71 due to the slope of the slots 70, and upon removal the catch 75 from the path of the return bend 77, permits a relative downward movement of the lower j aw'member 61 until the cable 65 is stretched tight. It will be seen that at this time a lift exerted through the cable 63 upon the upper jaw member 61 is transferred through the cable 65 to the head 28, and that the lower jaw member and a sleeve 15 iscarried by the member 32 situated in the lower end of the sleeve 15; and that therefore, the weight of the lower jaw member and the sleeve acting upon the member 32, serves to hold the jaw members forcibly together so thereby will be securely gripped.

. We claim as our invention:

1. In a fishing tool, the combination of: a head; a plurality of jaw members pivotally secured to said head; means for holding said jaw members normally spread apart; a member adapted to slide down on said jaw members so as to force them together; a tubular member extending downwardly over said head and supporting said sliding member; and slips operative between said head and said tubular member whereby a lifting action applied to said tubular member will be transferred to said head.

2. In a fishing tool, the combination of: a head; a plurality of jaw members pivotally secured to said head, said jaw members having upper legs; spring members engaging said upper legs for holding said jaw members normally spread apart; a member adapted to slide down on said j aw members so as to force them together; a tubular member extending downwardly over said head and that any article engaged supporting said sliding member; and slips mounted in said head and operative between said head and said tubular member whereby a lifting action applied to said tubular member will be transferred to said head.

3. In a fishing tool, the-combination of: a head; a plurality of jaw members downwardly suspended from said head; means for holding said jaw members normally spread apart; a member adapted to slide down on said jaw members so as to force them together; a tubular member extending downwardly over said head and supporting said sliding member; slips mounted in said head and operative between said head and said tubular member whereby a lifting action applied to said tubular member will be trans ferred to said head; and means for releasing said slips.

4. In a fishing tool, the combination of: a head; a plurality of jaw members downwardly suspended from said head; means for holding said jaw members normally spread apart; a member adapted to slide down on said jaw members so as to force them together; a tubular member extending downwardlyover said head and supporting said sliding member; slips mounted in said head and operative between said head and said tubular member whereby a lifting action applied to said tubular member will be transferred to said head; and a sleeve member adapted to slide within said tubular memher for releasing said slips.

5. In a well fishing tool, the combination of: a head; a plurality of jaw members suspended from said head; means for holding said jaw members normally spread apart; a member adapted to slide down on said jaw members so as to force them together; and separate means reciprocal in the well for resetting said members.

In testimony whereof, we have hereunto set our hands at Fellows, California, this 13th day of February 1923.

WILLIAM E. DAVISON. WILLIAM B. MARSHALL. 

